Whose support of slavery led them to disavow their loyalty to the united states? what evidence did they have on why they did it?

 Southern states, which seceded from the United States to form the Confederate States of America.

History/context:

The election of 1860 was focused on issues of slavery and states rights.  As reported by the West Virginia Dept. of Arts, Culture, and History, "Abraham Lincoln, the Republican Party's nominee in 1860, was seen as a moderate on slavery, but Southerners feared that his election would lead to its demise, and vowed to leave the Union if he was elected."  

Lincoln was morally opposed to slavery, but he also recognized that slavery was permitted by the existing law of the land, the US Constitution. So Lincoln's initial position on slavery was to stop the spread of it.  

In the South, however, many feared a much more activist agenda from Lincoln and the Republicans.  According to the History Channel, "The election of Abraham Lincoln was labeled an act of war by some Southern politicians, who predicted armies would come to seize slaves and force white women to marry black men."   So as soon as Lincoln was elected, planning for secession began to occur in states across the South.  By February, 1861, seven states had succeeded.  Representatives of those seven states (South Carolina, Mississippi, Florida, Alabama, Georgia,  Louisiana, and Texas) met in Montgomery, Alabama, and formed the Confederate States of America.  Four more states joined the Confederacy later in 1861:  Virginia, Arkansas, North Carolina, and Tennessee.

overview:

this is a technology-dependent lesson that students can guide at their own pace of exploration and learning. students share what they learn through the use of twitter (or alternative classroom sharing medium like todaysmeet). the use of a social sharing platform like twitter gives students a place for sharing with a wider audience, for more effective means of communication with each other, for incorporating viewpoints from all students in the classroom, and a means to reference thinking and learning by the use of a hashtag at a later time. students will understand the role the allied air forces played in the normandy invasion. teachers can use this as a stand-alone lesson or offer more structure by guiding students through each source, one by one. teachers may learn more about the eighth air force by accessing the abmc’s strategic bombing campaign interactive.